net/af_xdp: use recvfrom instead of poll syscall

poll() is more expensive and requires more tuning
when used with the upcoming busy polling functionality.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c
index be524e4..9c0e935 100644 (file)
--- a/drivers/net/af_xdp/rte_eth_af_xdp.c
+++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
@@ -263,7 +263,8 @@ af_xdp_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
        if (nb_pkts == 0) {
 #if defined(XDP_USE_NEED_WAKEUP)
                if (xsk_ring_prod__needs_wakeup(fq))
-                       (void)poll(rxq->fds, 1, 1000);
+                       recvfrom(xsk_socket__fd(rxq->xsk), NULL, 0,
+                               MSG_DONTWAIT, NULL, NULL);
 #endif
 
                return 0;
@@ -335,7 +336,8 @@ af_xdp_rx_cp(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
        if (nb_pkts == 0) {
 #if defined(XDP_USE_NEED_WAKEUP)
                if (xsk_ring_prod__needs_wakeup(fq))
-                       (void)poll(rxq->fds, 1, 1000);
+                       recvfrom(xsk_socket__fd(rxq->xsk), NULL, 0,
+                               MSG_DONTWAIT, NULL, NULL);
 #endif
                return 0;
        }